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Merge pull request #16 from camdenorrb/jit-arm-optimizations

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Jit arm optimizations from various unmerged prs
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Camden 2024-12-15 17:41:14 -06:00 • committed by GitHub
commit df9dd7d519
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3 changed files with 29 additions and 14 deletions
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31
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
View file

@ -1394,23 +1394,34 @@ void JitArm64::subfic(UGeckoInstruction inst)
else else
{ {
const bool will_read = d == a; const bool will_read = d == a;
const bool is_zero = imm == 0;
gpr.BindToRegister(d, will_read); gpr.BindToRegister(d, will_read);
// d = imm - a
ARM64Reg RD = gpr.R(d); ARM64Reg RD = gpr.R(d);
if (imm == -1)
{ {
Arm64GPRCache::ScopedARM64Reg WA(ARM64Reg::WZR); // d = -1 - a = ~a
if (!is_zero) MVN(RD, gpr.R(a));
// CA is always set in this case
ComputeCarry(true);
}
else
{
const bool is_zero = imm == 0;
// d = imm - a
{ {
WA = will_read ? gpr.GetScopedReg() : Arm64GPRCache::ScopedARM64Reg(RD); Arm64GPRCache::ScopedARM64Reg WA(ARM64Reg::WZR);
MOVI2R(WA, imm); if (!is_zero)
{
WA = will_read ? gpr.GetScopedReg() : Arm64GPRCache::ScopedARM64Reg(RD);
MOVI2R(WA, imm);
}
CARRY_IF_NEEDED(SUB, SUBS, RD, WA, gpr.R(a));
} }
CARRY_IF_NEEDED(SUB, SUBS, RD, WA, gpr.R(a)); ComputeCarry();
} }
ComputeCarry();
} }
} }

3
Source/Core/Core/PowerPC/JitArm64/JitArm64_LoadStore.cpp
View file

@ -817,9 +817,8 @@ void JitArm64::dcbx(UGeckoInstruction inst)
STR(IndexType::Unsigned, loop_counter, PPC_REG, PPCSTATE_OFF_SPR(SPR_CTR)); STR(IndexType::Unsigned, loop_counter, PPC_REG, PPCSTATE_OFF_SPR(SPR_CTR));
// downcount -= (WA * reg_cycle_count) // downcount -= (WA * reg_cycle_count)
MUL(WB, WA, reg_cycle_count); MSUB(reg_downcount, WA, reg_cycle_count, reg_downcount);
// ^ Note that this cannot overflow because it's limited by (downcount/cycle_count). // ^ Note that this cannot overflow because it's limited by (downcount/cycle_count).
SUB(reg_downcount, reg_downcount, WB);
STR(IndexType::Unsigned, reg_downcount, PPC_REG, PPCSTATE_OFF(downcount)); STR(IndexType::Unsigned, reg_downcount, PPC_REG, PPCSTATE_OFF(downcount));
SetJumpTarget(downcount_is_zero_or_negative); SetJumpTarget(downcount_is_zero_or_negative);

9
Source/Core/Core/PowerPC/JitArm64/JitArm64_Paired.cpp
View file

@ -7,6 +7,7 @@
#include "Common/CommonTypes.h" #include "Common/CommonTypes.h"
#include "Common/Config/Config.h" #include "Common/Config/Config.h"
#include "Common/StringUtil.h" #include "Common/StringUtil.h"
#include "Common/Unreachable.h"
#include "Core/Config/SessionSettings.h" #include "Core/Config/SessionSettings.h"
#include "Core/ConfigManager.h" #include "Core/ConfigManager.h"
@ -337,8 +338,12 @@ void JitArm64::ps_sel(UGeckoInstruction inst)
const auto V0Q = fpr.GetScopedReg(); const auto V0Q = fpr.GetScopedReg();
const ARM64Reg V0 = reg_encoder(V0Q); const ARM64Reg V0 = reg_encoder(V0Q);
m_float_emit.FCMGE(size, V0, VA); m_float_emit.FCMGE(size, V0, VA);
m_float_emit.BSL(V0, VC, VB); if (d == b)
m_float_emit.MOV(VD, V0); m_float_emit.BIT(VD, VC, V0);
else if (d == c)
m_float_emit.BIF(VD, VB, V0);
else
Common::Unreachable();
} }
ASSERT_MSG(DYNA_REC, singles == (fpr.IsSingle(a) && fpr.IsSingle(b) && fpr.IsSingle(c)), ASSERT_MSG(DYNA_REC, singles == (fpr.IsSingle(a) && fpr.IsSingle(b) && fpr.IsSingle(c)),